Context. Coronal mass ejections (CMEs) and solar flares are the most energetic transient phenomena taking place at the Sun. Together they are principally responsible for disturbances in outer geospace. Coronal mass ejections and solar flares are believed to be correlated with the solar cycle, which is mainly characterized by sunspot numbers.

Aims. Here, we search for pattern identification in CMEs, X-ray solar flares, and sunspot number time series using a new data mining process and a quantitative procedure to correlate these series.

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The top figure is particularly interesting to me given some history, not all known to Talkshop readers. Some time ago I got involved in a minor disagreement with LS. over a work where he made a fuss about a satellite very short wave dataset which seemed to him to show the satellite instrumentation was failing. To his credit he did publish what the satellite data keepers had to say, firmly disagreed. I am not aware of a definite conclusion.

I reworked roughly what LS had done but to high resolution, disagreeing further with what had been said. The data indicated a peculiar rise in solar output which I noted as an open wondering seemed to coincide with excess Arctic ice loss. The whole of cycle 23 at that time seemed to be unusual.

I don’t get into fights, waste of effort, so it was all left as a wondering. Maybe I did post something on this, don’t recall.

See why the plot now tweaks my interest? If true this might have implications for earth data.

Extract from paper Fig. 3 implying CME activity tended to be contiguous across cycle 23/24, although the paper coda about dataset usage should be noted.

There is no particular conclusion more than pointing out what I am seeing.

Post by Tim

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“Results. The results have shown the existence of periodic and intermittent signals in the CMEs, flares, and sunspot time series. For the CME and flare series, few and relatively short time intervals without any signal were observed. Signals with an intermittent character take place during some epochs of the maximum and descending phases of the solar cycle 23 and rising phase of solar cycle 24. A comparison among X-ray flares, sunspots, and CME time series shows a stronger relation between flare and CMEs, although during some short intervals (four–eight months) and in a relatively narrow band. Yet, in contrast we have obtained a fainter or even absent relation between the X-ray flares and sunspot number series as well as between the CMEs and sunspot number series.”

“Communications with the STEREO Behind spacecraft were interrupted on October 1, 2014 immediately after a planned reset of the spacecraft performed as part of a test of solar conjunction operations. There have been no successful communications since then, …”

I read an interesting article recently about the Sun actually having a “Surface” because you could see the Coronal Mass Ejections falling back to the sun and Impacting the Surface like drops of water hitting the surface of water.

“Sometimes its smart too trust your feeling. I was almost going to bed when i decided to give it a chance. 2.45 AM i took my camera and went up in the forrest just behind my house in Tromsdalen. And what was waiting fore me, Look fore yourselves and just enjoy it. IT WAS AMAZING”

Right after sunset on Dec. 22nd, the [polar stratospheric] clouds were so bright they were uncomfortable to look at directly,” says Marthinusen.

Also known as “nacreous” or “mother of pearl” clouds, these icy structures form in the lower stratosphere when temperatures drop to around minus 85ºC. Sunlight shining through tiny ice particles ~10µm across produce the characteristic bright iridescent colors by diffraction and interference. Once thought to be mere curiosities, some PMCs are now known to be associated with the destruction of ozone.

I didn’t spot that craig. Ozone is lost during darkness, lack of UV where right now there is deep Arctic winter. (was considering a post showing insolation, just how low it gets, but at the moment I have a lot of serious technical problems stopping me doing much)

The evening after the x-ray flare we had the most spectacular sunset I have seen in years.

Untouched other than resize from an old Canon digital. It really was brightly coloured. Best view I could get from here, out of attic skylight. A fairly clear sky is rare in England during the winter.

It is raining here in southern England, rising temperature, much too warm for snow. Ho ho, if Roger is where I think he is, might be white.

I’ve been having a terrible time over the past week trying to find a workaround for a software breakage so I’ve not been paying attention to much. Met Office forecasts and weather have been automatically logged. (not what someone else broke).